#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define int ll
signed main()
{
  
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin >> n;

    for (int i = 0; i <= 250; ++i)
        for (int j = 0; j <= 250 && i + j <= 250; ++j)
            for (int k = 0; k <= 250 && i + j + k <= 250; ++k)
                if (i * (i - 1) / 2 + i * j + j * k == n)
                {
                    cout << i + j + k << "\n";
                    for (int sb = 1; sb <= i; sb++)
                        cout << 1 << " ";
                    for (int sb = 1; sb <= j; sb++)
                        cout << 2 << " ";
                    for (int sb = 1; sb <= k; sb++)
                        cout << 3 << " ";
                    return 0;
                }
}